package com.lagou.config;

import com.lagou.pojo.Configuration;
import com.lagou.pojo.MappedStatement;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import java.io.InputStream;
import java.util.List;

public class XMLMapperBuilder {

    private Configuration configuration;

    public XMLMapperBuilder(Configuration configuration) {
        this.configuration =configuration;
    }

    public void parse(InputStream inputStream) throws DocumentException {

        Document document = new SAXReader().read(inputStream);
        Element rootElement = document.getRootElement();

        String namespace = rootElement.attributeValue("namespace");

        List<Element> list = rootElement.elements();
        for (Element element : list) {
            String id;
            String resultType;
            String parameterType;
            String sqlText;
            MappedStatement mappedStatement = new MappedStatement();
            String key;
            if(element.getName().equals("select")){
                id = element.attributeValue("id");
                resultType = element.attributeValue("resultType");
                parameterType = element.attributeValue("parameterType");
                sqlText = element.getTextTrim();
                mappedStatement.setId(id);
                mappedStatement.setResultType(resultType);
                mappedStatement.setParamterType(parameterType);
                mappedStatement.setSql(sqlText);
                key = namespace+"."+id;
            }else {
               id = element.attributeValue("id");
                parameterType = element.attributeValue("parameterType");
                sqlText = element.getTextTrim();

                mappedStatement.setId(id);

                mappedStatement.setParamterType(parameterType);
                mappedStatement.setSql(sqlText);
            key = namespace+"."+id;

            }
            configuration.getMappedStatementMap().put(key,mappedStatement);


        }

    }


}
